Solve, using the substitution method.

y - 3x = 7

21 + 9x = 3y

A.

There is no solution.

B.

There are an infinite number of solutions.

C.

The solution is (1, 10)

D.

The solution is (28, 0)

Records kept by the national ski patrol and the national safety council show that, over a period of 14 years, 52.25 million people visited the slopes annually, with an average of 34 deaths each year.

Which addition property is demonstrated by this problem? 8.473 + 0 = 8.473

Matrix L is a 1 ⨯ 8 matrix, matrix M is a 8 ⨯ 8 matrix, matrix N is a 1 ⨯ 1 matrix, and matrix P is a 8 ⨯ 1 matrix. Find the dimensions of the sums below, if they exist. (If an answer does not exist, enter DNE.

Which unit would be most appropriate for measuring the length of a pencil? a. yard b. mile c. foot d. inch

Carlos bought 17 pens for 13.60. Jen bought 14 pens. how much did she spend?

Don and Donna are preparing a budget for the coming year. They want to know how much to budget each month for the electric bill.

Write in algebraic expression (the product of 5 and p increased by 10)

If the public debt of the United States in 2004 was $7,379,052,696,330.32 and the budget deficit in 2005 was $553,656,965,393.18, what was the public debt in 2005?

Line segment AB has a length of 4 units. It is translated 1 unit to the right on a coordinate plane to obtain line segment A prime B prime. What is the length of A prime B prime?

A swimming pool had 2.5 million liters of water in it. Some water evaporated, and then the pool only had million liters of water in it. What percent of the water evaporated?